Why are Christian and Muslim Buddhist all spelled with a capital letter?

You are right to notice that! It's a common mistake, but the correct capitalization is:

* Christian

* Muslim

* Buddhist

Here's why:

* Religion: When referring to a religion as a proper noun, we capitalize it. Think of it like a name, like "Christianity" or "Islam."

* Adjective: When referring to a person who follows that religion, it becomes an adjective. For example, "a Christian man" or "a Muslim woman." Adjectives generally are not capitalized, except when they are part of a proper noun (like "American" in "American history").

Let me know if you have any other questions about capitalization!